A cast-in-situ stair closed formwork system and a construction method thereof

Abstract

The present application relates to cast-in-situ stair construction technology field, aims at solving the method of traditional cast-in-situ concrete stair cannot be continuously poured, and subsequent still needs to collect surface to step many times, the problem of low construction efficiency, and the stair cannot be used as vertical transport passage before the final setting of concrete, provide a cast-in-situ stair closed formwork system and its construction method, wherein, the cast-in-situ stair closed formwork system includes multiple profiled formworks, two adjacent profiled formworks are assembled and fixedly connected, the profiled formwork adopts metal plate, and each profiled formwork is bent to form the tread formwork and the kick formwork of multistage stair; the profiled formwork and the side formwork located on its two sides, the bottom formwork located below it jointly form closed formwork system, the profiled formwork is fixedly connected with the side formwork on two sides, and the bottom formwork is fixedly connected with the side formwork.The present application can continuously pour the stair step concrete, improve work efficiency, adopt the profiled formwork to improve the forming quality of cast-in-situ stair, and simultaneously reduce the tread concrete multiple collection surface work.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cast-in-place stair construction technology, in particular to a cast-in-place stair closed formwork system and a construction method thereof. BACKGROUND

[0002] At present, the conventional construction method of cast-in-place concrete stairs is to use a bottom formwork, a side formwork and a kick-off formwork (i.e. a step vertical formwork) to form a formwork system. Since the steps are only separated by vertical formworks, the top surface is hollow, and the concrete is poured from the hollow surface.

[0003] The construction process has the following problems:

[0004] 1. The stair segment concrete cannot be continuously poured, which is time-consuming and labor-intensive. Since the stair steps have different elevations, the concrete should be poured from the lower part to the upper part. When pouring the upper concrete, if the concrete has high fluidity, the lower concrete will be extruded by the weight of the upper concrete and overflow the step surface. Therefore, the stair segment concrete needs to be poured again when it approaches the initial setting.

[0005] 2. The step surface of each step of the stair needs to be manually finished to ensure the flatness of the step surface, which reduces the construction efficiency.

[0006] 3. The stair cannot be used as a vertical transportation channel before the concrete is fully cured. Walking on the steps during the curing of the stair segment concrete can leave footprints, which affect the appearance of the concrete.

[0007] 4. The stair segment is easily damaged after forming and needs to be protected. Since the stair is a passage for people and materials, the traffic volume is large, and the stair segment product is easily damaged. During daily use, the steps need to be surrounded by formworks for product protection. SUMMARY

[0008] The present application aims to provide a cast-in-place stair closed formwork system and a construction method thereof to solve the problems of the traditional cast-in-place concrete stair method, such as the inability to continuously pour, the need for multiple subsequent step finishing, low construction efficiency, and the inability to use the stair as a vertical transportation channel before the concrete is fully cured.

[0009] The present application is implemented by using the following technical solutions:

[0010] The present application provides a cast-in-place stair closed formwork system, which includes multiple shaped formworks. Adjacent two shaped formworks are assembled and fixedly connected. The shaped formworks are made of metal plates. Each shaped formwork is bent to form a step surface formwork and a kick-off formwork of a multi-level stair.

[0011] The shaped template, side templates on both sides thereof and a bottom template below the shaped template jointly form a closed template system, the shaped template is fixedly connected with the side templates on both sides thereof, and the bottom template is fixedly connected with the side templates.

[0012] As a preferred technical solution:

[0013] The shaped template is provided with a pouring and vibrating hole and an exhaust hole.

[0014] As a preferred technical solution:

[0015] The female corners and the male corners of the shaped template are both provided with reinforcing members.

[0016] As a preferred technical solution:

[0017] The reinforcing member is an angle steel, and the angle steel is welded to the shaped template.

[0018] As a preferred technical solution:

[0019] The shaped template is provided with two lifting rings at upper and lower ends thereof.

[0020] As a preferred technical solution:

[0021] The lifting rings are fixedly connected to the angle steels.

[0022] As a preferred technical solution:

[0023] Two adjacent shaped templates are fixedly connected through a screw rod and a nut.

[0024] As a preferred technical solution:

[0025] The shaped template is connected with connecting members on both sides thereof, the connecting members are used to increase the connecting area of the shaped template and the side templates and to avoid slurry leakage between the shaped template and the side templates.

[0026] As a preferred technical solution:

[0027] The connecting members are angle steels.

[0028] The application further provides a construction method of the cast-in-place stair closed template system, and the method comprises the following steps:

[0029] S1: Preparing a plurality of shaped templates in a factory and checking and accepting the shaped templates;

[0030] S2: Setting up a stair template support frame at a construction site;

[0031] S3: Installing a stair bottom template and side templates;

[0032] S4: binding the stair reinforcement and carrying out concealed acceptance;

[0033] S5: installing the shaping template;

[0034] S6: installing the counter-bolts between the bottom template and the shaping template and between the two opposite side templates to reinforce the whole stair;

[0035] S7: pouring the concrete.

[0036] As a preferred technical solution:

[0037] In S5, the shaping templates are installed from bottom to top in sequence.

[0038] As a preferred technical solution:

[0039] In S7, when pouring the concrete, the pouring is carried out from the pouring hole on the shaping template, and the pouring is carried out in sections from bottom to top, one section is vibrated after another section is poured, and the concrete filling condition is judged through the exhaust hole reserved on the shaping template.

[0040] As described above, due to the adoption of the above technical solution, the beneficial effects of the present application are:

[0041] 1. The present application adopts the shaping template, each shaping template is bent to form the tread template and the kick template of the multi-stage stair, and the shaping template, the side template located on both sides thereof and the bottom template located below the shaping template jointly form the closed template system. The closed template system can continuously pour the stair step concrete, improving the work efficiency; the closed template system can avoid the influence of the up-and-down passing and treading the concrete surface on the forming sense before the final setting of the stair step concrete, the closed template system wraps the stair step concrete, the shaping template can be used as the vertical transportation channel first without affecting the concrete forming therein; the closed template system protects the formed stair, avoiding the damage of personnel passing and material transportation to the stair.

[0042] 2. The shaping template of the present application can improve the overall forming quality of the cast-in-place stair step and reduce the multiple surface collection work of the tread concrete; one shaping template can be used as the tread template and the kick template of the multi-stage stair, greatly reducing the template installation time and improving the construction efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 The figure is a structural schematic view of the closed template system of the cast-in-place stair described in the present application.

[0044] Figure legend: 1-shaping template, 11-tread template, 12-kick template, 2-strengthening piece, 3-connection piece, 4-screw rod, 5-hanging ring, 6-exhaust hole, 7-pouring and vibrating hole. DETAILED DESCRIPTION

[0045] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0046] Embodiment 1

[0047] As shown in the drawings, the present embodiment provides a cast-in-place stair closed formwork system, which comprises a plurality of shaped formworks 1, two adjacent shaped formworks 1 are fixedly connected by assembling, the shaped formwork 1 is made of a metal plate, and each shaped formwork 1 is bent to form a tread formwork 11 and a kick formwork 12 of a multi-stage stair. In the present embodiment, the shaped formwork 1 is made of a 3mm-thick steel plate, the steel plate is bent to form a stepped shape, and specifically, the steel plate is bent to form a three-stage stepped shape. Figure 1 The shaped formwork 1 is provided with a reinforcing member 2 at each inside corner and outside corner, the reinforcing member 2 is an angle steel, the angle steel is welded to the shaped formwork 1, the angle steel is in close contact with the kick formwork 12 and the tread formwork 11, and is completely buckled on the outside corner of the shaped formwork 1 or completely clamped in the inside corner of the shaped formwork 1, thereby further increasing the strength of the shaped formwork 1 and reinforcing the formwork.

[0048] The shaped formwork 1, a side formwork on each side thereof and a bottom formwork below the shaped formwork 1 jointly form a closed formwork system, the shaped formwork 1 is fixedly connected with the side formworks on both sides thereof, and the bottom formwork is fixedly connected with the side formworks.

[0049] Specifically, the connection mode between the components in the closed formwork system is that two adjacent shaped formworks 1 are fixedly connected by a screw rod 4 and a nut. The screw rod 4 is welded to the kick formwork 12 of the lower shaped formwork 1, a through hole corresponding to the position of the screw rod 4 is formed in the outside corner angle steel of the upper shaped formwork 1, the screw rod 4 is passed through the through hole and fastened by the nut. In this way, two adjacent shaped formworks 1 are fixedly connected together, a plurality of screw rods 4 can be arranged according to actual needs, and a corresponding number of through holes are formed, and two adjacent shaped formworks 1 are fixedly connected by a plurality of groups of screw rods 4 and nuts.

[0050]

[0051] ​The connecting piece 3 is an angle steel, one side of the angle steel is attached to the shaped template 1, and the other side is attached to the side template. The angle steel increases the attachment area of the shaped template 1 and the side template, increases the connecting strength of the two, and avoids the situation that the shaped template 1 and the side template leak slurry.

[0052] The shaped template 1 is installed in a hoisting manner, therefore, two lifting rings 5 are arranged on the shaped template 1, and are located at the upper and lower ends of the shaped template 1, so as to facilitate hoisting installation. The lifting ring 5 is fixedly connected to the reinforcing piece 2 (angle steel), and the lifting ring 5 is welded to the reinforcing piece 2.

[0053] In the embodiment, the shaped template 1 is also provided with a pouring and vibrating hole 7 and an exhaust hole 6. Concrete is poured into the closed template system from the pouring and vibrating hole 7, and then is vibrated, and the concrete filling condition can be judged through the exhaust hole 6.

[0054] The construction method of the cast-in-place stair closed template system includes the following steps:

[0055] S1: A plurality of shaped templates 1 are prefabricated in a factory, and are inspected and accepted;

[0056] S2: A stair template support frame is erected at a construction site;

[0057] S3: A stair bottom template and a side template are installed;

[0058] S4: Stair reinforcement is bound and is subjected to concealed acceptance;

[0059] S5: The shaped templates 1 are sequentially installed from bottom to top;

[0060] S6: A tension bolt is installed between the bottom template and the shaped template 1, and between two opposite side templates, and the stair is reinforced as a whole;

[0061] S7: Concrete is poured from the pouring hole of the shaped template 1, and is poured in sections from bottom to top, and the concrete filling condition is judged through the exhaust hole 6 reserved on the shaped template 1.

[0062] The above only describes the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cast-in-place staircase closed formwork system, characterized by: It includes multiple shaped templates, two adjacent shaped templates are assembled and fixedly connected, the shaped templates are made of metal plates, and each shaped template is bent to form a tread template and a riser template of a multi-level staircase; The shaping template, the side templates on both sides thereof, and the bottom template below it together form a closed template system. The shaping template is fixedly connected to the side templates on both sides, and the bottom template is fixedly connected to the side templates. The shaping template is provided with pouring and vibrating holes and exhaust holes; The inner and outer corners of the shaped template are both equipped with reinforcements; Two adjacent shaping templates are fixedly connected by screws and nuts; Connectors are connected to both sides of the shaping template, and the connectors are used to increase the connection area between the shaping template and the side templates.

2. The cast-in-place staircase closed formwork system according to claim 1 is characterized in that: The reinforcement is an angle steel, and the angle steel is welded to the forming template.

3. The cast-in-place staircase closed formwork system according to claim 2, characterized in that: The shaping template is provided with two hanging rings, which are respectively located at the upper and lower ends of the shaping template.

4. The cast-in-place staircase closed formwork system according to claim 3, characterized in that: The lifting ring is fixedly connected to the angle steel.

5. The construction method of the cast-in-situ staircase closed formwork system according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1: Prefabricate multiple standard templates in the factory and inspect and accept them; S2: Set up stair formwork support frame at the construction site; S3: Install stair bottom formwork and side formwork; S4: Tie up the steel bars of the stairs and conduct concealed inspection; S5: Install the finalized template; S6: Install tension bolts between the bottom formwork and the final formwork, and between the two opposite side formworks to reinforce the staircase as a whole; S7: pouring concrete.

6. The construction method of the cast-in-place staircase closed formwork system according to claim 5, characterized in that: In S5, the shaping templates are installed sequentially from bottom to top.

7. The construction method of the cast-in-place staircase closed formwork system according to claim 5, characterized in that: In S7, when pouring concrete, pouring is carried out from the pouring holes on the fixed formwork, pouring in sections from bottom to top, vibrating each section after pouring, and judging the filling condition of the concrete through the exhaust holes reserved on the fixed formwork.

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